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Question-1 A flywheel rotating about a fixed axis has a kinetic energy of 360J when its angular speed is 30 rad/s. The moment of inertia of the wheel about the axis of rotation is _______.

(A) 0.6 kgm²	(B)0.15 kgm²
(C)0.8 kgm²	(D)0.75 kgm²

Question-2 A solid sphere of radius R is placed on a smooth horizontal surface. A horizontal force F is applied at height h from the lowest point. For the maximum acceleration of the centre of mass

(A) h = R	(B)h = 2R
(C)h = 0	(D)The acceleration will be same whatever h may be

Question-3 Angular momentum :

(A) Vector (axial )	(B)Vector ( polar )
(C)Scalar	(D)None of these

Question-4 Moment of inertia of a uniform circular disc about a diameter is I. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be

(A) 51	(B)31
(C)61	(D)41

Question-5
Two bodies of mass 1 kg and 3 kg have position vectors respectively. The centre of mass of this system has a position vector

(A)	(B)
(C)	(D)

Question-6 A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the other end is.

(A)	(B)
(C) MLω²	(D)

Question-7 A ball of mass 0.25 kg attached to the end of a string of length 1.96 m is moving in a horizontal circle. The string will break if the tension is more than 25 N. What is the maximum speed with which the ball can be moved ?

(A) 14 m/s	(B)3 m/s
(C)3.92 m/s	(D)5 m/s

Question-8 A ring of mass m and radius r rotates about an axis passing through its center and perpendicular to its plane with angular velocity on its kinetic energy is _______

(A) ¹/₂ mr² ω²	(B) mrω²
(C)mr²ω²	(D) ¹/₂ mrω²

Question-9 A solid sphere, disc and solid cylinder, all of the same mass and made of same material are allowed to roll down ( from rest ) on the inclined plane, then :

(A) Solid sphere reaches the bottom first	(B)Solid sphere reaches the bottom last
(C)Disc will reach the bottom first	(D)All reach the bottom at the same time

Question-10 If a flywheel makes 120 rev/min, then its angular speed will be

(A) 8 π rad/s	(B)6 π rad/s
(C)4 π rad/s	(D)2 π rad/s

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Plus 1 Biology Science

CBSE

Practice in Related Chapters
Units and Measurements
Motion in a Straight Line
Laws of Motion
Mechanical Properties of Solids
Motion in a Plane
Waves
Gravitation
Thermodynamics
Thermal Properties of Matter
Work,Energy and Power
Kinetic Theory
System of Particles and Rotational Motion
Oscillations
Mechanical Properties of Fluids

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